Karnataka 1st PUC Model Question Paper 2027 for Biology (Paper 2)

FOR KARNATAKA CLASS 11 PREPARATION

Karnataka 1st PUC
Model Question Paper
2027 for Biology (Paper
2)
EXAM YEAR TYPE SUBJECT

Karnataka Class 11 2027 Sample Paper Biology

Notes · Sample Papers · Previous Year Papers · Mock Tests

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DEPARTMENT OF SCHOOL EDUCATION (PRE-UNIVERSITY)
MODEL QUESTION PAPER -2
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TIME: 3 HOURS [TOTAL QUESTIONS: 44]
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MAX MARKS:

GeneralaInstructions
 This Question paper consists of four parts A, B, C D and E.
 Part A consists of I and II and Part D consists of two parts, section V and VI.
 All the parts are compulsory.
 The answers for Part A written in the first two pages of the answer booklet are only considered
for evaluation.
 Part E consists of questions for visually challenged students only.
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PART - A
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ltoa the rules of nomenclature?
I. Select the correct alternative from the choices given below. 1 × 15 = 15

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1. Which one of the following is contrary
a) First word in a biological name represents the genus name and the second is a specific epithet.
b) Biological names can be written in any language.
c) When written by hand, the names are to be underlined.
d) Names are written in Latin and are italicized.
2. The most abundant prokaryotes helpful to humans in making curd from milk and in production of

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antibiotics are the ones categorized as
ma) Heterotrophic bacteria
c. o c) Archaebacteria m
b) Chemosynthetic autotrophs

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d) Cyanobacteria

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a a) Mosses b) Cycads c) Kelps d) Ferns
4. Statement I: Polyp and medusa are the two basic body forms in cnidarians.
Statement II: Polyps produce medusa sexually and medusa form polyps asexually.
a) Statement I is correct but statement II is incorrect.
b) Statement I is incorrect but statement II is correct.

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c) Both statements I and statement II are correct.
d) Both statement I and statement II are incorrect.
5. Find out the wrong statement about angiosperm roots.
a) Cuticle is absent in young stages.
b) The apex is protected by root cap.
c) Vascular bundles are collateral.
d) Xylem is centripetal in growth in the young roots.
6. Which one of the following organelle in the figure correctly matches with its function?

a) Rough endoplasmic reticulum - Formation of glycoproteins
b) Golgi apparatus - Protein synthesis
c) Golgi apparatus - Formation of glycolipids
d) Rough endoplasmic reticulum - Protein synthesis
7. Nucleoplasm is site for
a) DNA synthesis b) rRNA synthesis c) mRNA synthesis d) Histones
8. Match the following
Coloumn 1 Coloumn 2
1. Alkaloids i. Curcumin
2. Essential Oils ii. Morphine
3. Drugs iii. Rubber
4. Polymeric substances iv. Lemon grass oil

a) 1-ii, 2-iv, 3-i, 4-iii b) 1-iii, 2-iv, 3-ii, 4-i
c) 1-ii, 2-i, 3-iii, 4-iv d) 1-i, 2-iii, 3-ii, 4-iv
9. For assimilation of one CO2 molecule, the energy required in form of ATP and NADPH2 are
a) 2 ATP and 2 NADPH2 b) 5 ATP and 3 NADPH2
c) 3 ATP and 2NADPH2 d) 18 ATP and 12 NADPH2
10. Respiratory Quotient (RQ) value of tripalmitin is
a) 0.09 b) 0.9 c) 0.7 d) 0.07

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11. Which of the following is a growth regulator produced by plants?
a) Naphthalene acetic acid b) Zeatin
d) 2, 4-Dichlorophenoxyacetic acid d) Benzyl aminopurine
12. Which of the following represents the correct pathway of conduction of the heartbeat?
a) AV node → SA node → Bundle of His → Purkinje fibres
b) SA node → AV node → Bundle of His → Purkinje fibres
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c) SA node → Bundle of His → AV node → Purkinje fibres
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d) Purkinje fibres.→ SA node → AV node → Bundle of His s e
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13. Select the correct
a
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Type of Example
a) Cartilaginous joint - Between frontal and parietal
b) Pivot joint - Between third and fourth cervical vertebrae
c) Hinge joint - Between humerus and pectoral girdle
d) Gliding joint - Between carpals
14. In human beings, the pairs of cranial nerves arising from the brain is

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c acts on
a) 12 b) 8 c) 24
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em of LH and FSH
15. GnRH, a hypothalamic hormone, needed in reproduction,
a) Anterior pituitary gland and stimulates s
la secretion of oxytocin and FSH
secretion

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b) Posterior pituitary gland and stimulates
c) Posterior pituitary gland and stimulates secretion of LH and relaxin
d) Anterior pituitary gland and stimulates secretion of LH and oxytocin
II. Fill in the blanks by choosing the appropriate word/words from those given in the bracket.
1×5=5
(Dicot stem, 8g/mL, plasmodesmata, biodiversity, apical dominance, 25-30 grams)
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16. The number and types of organisms present on earth is referred to as ______ .

omStarch sheath is present in the endodermis of _________ .
c. 18.
17.
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The cytoplasmic connections between neighboring plant cell are
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a of lateral buds.
______________.

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ag 20. A healthy adult human on an average excretes __________ of urea per day.
PART - B
III. Answer any FIVE of the following questions in 3-5 sentences each wherever applicable:
2 × 5 = 10
21. What are the two stages in the gametophytic phase of mosses?

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22. All vertebrates are chordates but all chordates are not vertebrates. Justify the statement.
23. Differentiate between root hairs and epidermal hairs.
24. Cell wall helps in cell to cell interaction and provides protection. Substantiate.
25. Name the organelles which disappear at the end of prophase in mitosis?
26. Graphically represent the ideal sigmoid growth curve of higher plants and label the parts.
27. What is Expiratory Reserve Volume (ERV)? Mention the average value of ERV of human.
PART - C
IV. Answer any FIVE of the following questions in about 40-80 words each wherever applicable:
28. What is diatomaceous earth? List its uses.
29. Identify the following:
a) Used as fuel and as packing material for trans-shipment of living material.
b) Used to grow microbes and in preparations of ice creams and jellies.
c) Develops directly from a spore in the life cycle of a moss.
30. Explain the different types of respiration in frogs.
31. Draw a neat labeled diagram of cell cycle.
32. Define the terms: a) Differentiation b) Dedifferentiation c) Redifferentiation
33. Mention the organs of respiration affected in the following respiratory disorders:
a) Asthma b) Emphysema c) Occupational Respiratory Disorders
34. Differentiate unipolar, bipolar and multipolar neurons.
PART – D
V. Answer any FOUR of the following questions in about 200-250 words each wherever
applicable. 5 × 4 = 20
35. Mention the general characters of the phylum porifera.
36. Write any five differences between prokaryotic cell and eukaryotic cell.
37. Classify the various classes of enzymes based on type of reaction they catalyze.
38. Differentiate between cyclic and non-cyclic photophosphorylation.
39. Give the schematic representation of glycolysis.
40. Categorize the following animals based on the nitrogenous excretory products:
a) Aquatic Amphibians b) Terrestrial Amphibians c) Reptiles
d) Bony fishes e) Marine fishes
41. Explain the steps involved in sliding mechanism of muscle contraction.

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VI. Answer
Ans anyy ONE off the follow
owing questio
a 200-2250 wordsds each wheherever
stions in about
ab
applica
icable. 5×1=5
42. Ans
nswer the follo
ollowing ques
uestions with
ith respect to
o diagram
d giv
iven below::

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a) Id
Identify thee ooutermost layer
l of thee seed marke
ked A

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b)) Name a paart B that sto
N lthe stores food
c) N a the sin
Name single cotyled
ledon C 1
d)) Name
N the sh
sheaths D & E that enclo
close the plum
lumule and radicle
rad respec
ectively. 2
43. Ref
efer to the dia
diagram give
iven below:

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a) W
What is depic
picted in thee figure? 1
b)) Mention
Me the
he two typess of
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tion f 2
c) CConstruct a fflow chartt for
f each off the
th circulati
ation. 2
44. Con
onduction off impulse through
thr an ax
axon is due to the presen
ence of ion ch
channels on
n the
t neural
mem
embrane. The
hese ion chan
annels are selectively
se peermeable to different io
ions. Explain
ain the
perm
ermeability of membrane
ne and the transport
tra of ions
io acrosss the
th membran
rane during conduction
c n of
o
imppulse throug
ugh one end to
t other end
nd of the axon
on.

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PA
PART -E
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(For vi
visually cha
hallenged stude
tudents only)
nly)

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hich of the fo
following statement
sta is nnot explaine
ned in cell theory?
the
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isms are the

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Cells compo
posed of cyto
toplasm andd nnucleus. d) Cells arises
aris from pr
pre-existingg cells
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42. Wha
hat is aestiva
vation? Expla
plain any four
ur types of aestivation
ae with
w an exam
ample for eac
ach.
43. Wri
rite a note on the causes
es and sympt
ptoms of eryth
ythroblastosis
sis foetalis

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